Thursday, November 3, 2016

Mealworms raised outside with Passive Solar Heating

I've found mealworms (Tenibrio molitor or Yellow Mealworm) can be raised in black plastic containers outdoors in a temperate climate provide the containers are in a sunny position causing them to heat up during the day. A simple, basically free, form of passive solar heating.

Mealworms of course require heat (and darkness) to survive and flourish but they are also surprisingly tolerant of temporary cold. They survived all winter outside in the containers here, where the night temperature typically drops to between 5 C and -3 C (zone 9, Wellington, New Zealand).

By contrast when I tried raising them inside the house, including above the water heater, this quickly failed, presumably because it was not nearly hot enough.

I had to secure the containers with wire mesh to stop them blowing away in the wind. I also taped screening around the lid to prevent the adult beetle from climbing out, I'm not sure this is necessary they don't seem to have thought of that so far. 

Another problem was figuring out if the containers were safe for raising insects in, unsurprisingly there is not much info on plastics suitable for insects. Some manufacturers market containers as "food grade", suitable for keeping food in, which I took to be ok, but finding one that says that and is black may be difficult. I resorted to buying a blue "fish bin" (for keeping fish in, presumably safe) and painting it black. It might even be possible to make a container out of wood and paint it black if you don't like plastic. 

I just feed them grass and weeds from the garden I know to be edible for humans, reportedly they will eat anything that is rotting.  

I have never raised mealworms with the usual artificial heat so can't compare productivity of outdoor containers with this. So far, I've only had them just over a year, they appear to go through one life-cycle a year.

I haven't spent much time on trying to complete the life cycle, from adult beetles to eggs and so on. Some websites say the beetles will eat their own eggs, I have not found this in any of the books I've found on the subject. Last year some eggs hatched after being outside in the box for winter when I didn't take the precaution of removing the adult beetles to stop them eating the eggs. This year this doesn't seem to have worked so far. Next time I'll try cleaning the boxes which I probably should have done (1.2.) I can't imagine experiencing comparatively mild Wellington winter temperatures is the problem given the much harsher places they are found in the wild.

My interest in mealworms is as part of my own diet and part of an effort to produce most of my own food on a small section. Mealworms appear to contain all the essential nutrients fruit and vegetables lack, so could possibly be a wise addition to a small self-sufficient homestead that can't fit larger animals. 

I tried eating a few the other day, after fasting them for 24 hours. I fried them in olive oil, they were crisp and melted in the mouth, not much to them. I suppose they were a little like the skin of Kentucky Fried Chicken, not bad, but bitter as well, something I fed them perhaps, or the oil? Will have to do more work in this area.

Footnote. What Wetas taste like.

While on the subject of eating insects, thought I'd answer the question "what does a Weta taste like?" I once found a Tree Weta in the bush lying on its back wriggling slowly, I brought it home, it died shortly after. I chewed the body, without cooking it, then spat it out and rinsed my mouth. It tasted exactly like Rotorua smells, like sulphur. I think it is remotely possible a taste could be acquired for it, people live in Rotorua after all. Aside from the exoskeleton it had the consistency of puss. Early Maori ate them but reportedly mushed up with other things (3) probably to mask the taste and texture.  

I defer to Weta experts I've contacted who say we should not eat Weta for conservation reasons. It's possible a case could be made for farming them but I'm not interested in that fight. I also recall reading they can be infested with parasites, it is possible these parasites could be very harmful to humans if they or their eggs were eaten alive.

1. Culturing Live Foods. Michael R Hellweg 2008
2. Eat this Bug. Lynn Davis 1996.
3. Which New Zealand Insect? Andrew Crowe. 2002 

Friday, August 19, 2016

Apparent Zealandia Kaka damage to Avocado Crop

Apparent Zealandia Kaka Bite Marks in Avocado 

Images of damage to Avocado Crop near Zealandia Reserve in Wellington, New Zealand. The crescent shape is consistent with bite marks from parrots on humans (1). I could not find any photos of Kaka bite marks but I can't see how it can be anything other than the NZ parrot known as Kaka from the recently instituted Zealandia Native Reserve. 

It looks like the Kaka attacked the fruit on at least three occasions separated by several weeks, but they did not destroy all of the crop, about half were damaged and in earlier years none were (the trees are young, so far bearing small crops of fruit for about four years). I get the impression the Kaka are investigating the fruit, being intelligent curious animals, having checked them out them it appears they had no further interest in them. So far it does not appear they are obsessed with eating the fruit or fruit in general but it is too soon to be certain. Avocados do not ripen on the tree and are "said to be toxic"(4) when unripe, at least to humans, it is hard to imagine any human getting any pleasure from eating the hard unripe fruit, I don't know about parrots.

Still, if this is damage from Kaka I find this rather annoying, I'm not against reserves or natives, I plant quite a few natives myself, but always edible ones where I live, alongside edible exotics. I think realistic environmentalism will promote edible and useful plant and animal species near where people live to reduce unnecessary resource depletion, waste and pollution associated with transportation. Unproductive untouched reserves like Zealandia are, in my opinion, better located in remote locations away from people for the good of both people and pristine native ecosystems. 

Having reserves in central city areas may even be ecologicallly conterproductive if it reinforces the myth that modern cities are part of a global industrial system that is ecologically viable, just needing a little cosmetic tweaking (a common phenomenon known to psychologists as the 'licencing syndrome' (2) which basically means "I've done something good" (e.g., I have protected a few acres of pure, pristine bush (or better still my government has done it for me)) "now I can do something bad" (e.g., get back to my (addiction to) industrial technology destroying the planet/people/myself).  

To say Kaka should be able to run rampant because they are "natural" is a little like saying we should we should drink untreated water because it is "natural" (although admittedly probably not quite as extreme). Pristine wilderness is dangerous to humans despite the fact that it is often romanticized by people thoroughly insulated from it, as the great environmentalist Rene Dubos pointed out (3).

At the very least it's worth noting it is not automatic moral perfection establishing nature reserves in the city, there are costs, some potentially devastating for certain types of genuine, hands on, nature and humanity lovers such as gardeners doing their best to become independent of environmentally devastating fossil fuel transported food and other goods. 

I emailed these photos to the Zealandia, Forest & Bird and the Department of Consevation, they suggested nets and planting something more desirable to distract them, perhaps that's the best we can hope for, unfortunately I find nets ugly & oppressive. They also pointed out it is illegal to "disturb" such species, so it sounds like Zealandia Kaka can destroy your property (such as home fruit trees which are much "greener" property than Zealandia I've argued) and you'll go to prison if you try to scare them off (!%#@!!???). Actually they mentioned (unsuccessful) attempts to scare them with balloons without any suggestion this was wrong so I assume reasonable attempts to scare them are legal. As far as I can see in the legislation "disturb" is only mentioned in the context of hunting protected species (as it should be), reasonable, humane, shooing of wildlife does not appear to be a concern, which seems like common sense surely.

I did recently realize the Kaka essentially ignored the bitter unripe green fruit of  a Pawpaw/babaco cross "Rainbow Valley" a few feet away from the Avocado. It appears they may have sampled them just a little (picture) and decided they didn't like them.

These unripe fruit are supposed to be edible, I eat them cooked sometimes, but they are quite bitter. Apparently birds can detect at least some types of bitterness in order to avoid poisonous plants. Seems like a (non-toxic) bitter spray might be a possibility for some crops, especially if it can be washed off the fruit when harveted & somehow made so it doesn't seep into the flesh. There does seem to be a least one commercial bird repellant spray for protecting fruit. It seems like a major long shot but perhaps sprays could even be used to prevent Kaka from stripping bark off of privately owned trees looking for edible moth larvae.

A hard unripe Avocado I tasted was not bitter, which may support this theory of bitterness being repellant, though was it almost mature, don't know about the younger fruit. 

Update 8/1/17

I caught a Kaka in the act of eating some of my first crop of Loquat fruit (Eriobotrya  japonica). I told it to bugger off, it obliged but was lurking around again shortly after. Interestingly the fruit had just reached full ripeness that day, I wonder if and how it knew that. Perhaps there's some way of fooling them fruit is unripe, a food colouring spray perhaps, you'd think green but that didn't put them off the Avocado. I've found Loquat fruit can be picked when partly green, not fully ripe, and ripened indoors, which may also be an option but reportedly the taste is not as good (4), I think this is true but have not had enough to be sure. An exquisite tasting fruit at its best, rather like pineapple and apricot jam.  


2. The Willpower Instinct. K McGonigal. 2012.
3. The Wooing of Earth. R Dubos. 1980.  

Dubos argues convincingly the "natural" places we really like being in have been significantly modified by humans. Few would want to spend time in the New Zealand bush if the world's largest ever predatory eagle, the Haast's Eagle, had not been made extinct by early Maori settlers (apparently by causing the extinction of its main food source, the Moa). It is considered likely this eagle preyed on the first human settlers. Perhaps if genetic engineering advances sufficiently we should bring this species back in the name of conservation, to prey on humans, because it is "natural" and "pure". Better still trying to defend yourself when they attack would of course have to be illegal because they're "native" and "pure".  

Obviously furthering the cause of purity have characterized many well known, and once very popular, devastating ideologies such as Nazism. I am not saying New Zealand conservationists are as bad as Nazis but the use of reserves as something that excuses a system destroying the planet, while making genuine efforts to develop ecologically responsible homesteads difficult or impossible because of destructive protected species, may be in the end be far more harmful to humanity, despite the best of intentions.

4. Discovering Fruit and Nuts. S Lyle. 2007.

Monday, July 4, 2016

Tasty berries of some hardy epiphytic bromeliads

Small fruit of Aechmea gamosepala (left) & Quesenelia marmorata (right) which I sampled as food recently. The dark purple ripe fruit of the Aechmea was sweet, not outstanding in flavor but good. The Quesenelia was much milder and less sweet in flavor, but nice if you eat a lot of them, rather like custard. I was surprised to find the skin of both fruit is too tough to eat, you have to squeeze the flesh out with your teeth holding the skin with your hand, probably not a plus though possibly could become habit forming like sucking on a lolly. On the basis of this one sample it is hard to imagine these fruits having very much use except perhaps as novel but pretty average flavoring and colouring for things like ice cream. 

I decided to try the fruit largely on the basis of the article Bromeliads: Edible and Theraputic by Michael Spencer 1981 . Journal of the Bromeliad Society Vol XXXI (4). There is a specific reference to Quesenelia marmorata being edible, I don't believe I ever found a specific reference to Aechmea gamosepala fruit being edible, only general statements about the genus having edible fruit as well as virtually no reports of toxicity in bromeliads except in unripe pineapples.

Although these fruit do not seem to be very noteworthy food I think they are a small but positive addition to the edible garden because the plants can grow without soil as air plants or epiphytes, producing in niches where most, if not all, more useful crops could not, so don't compete with them for space. I grew these on the south facing side of a house in Wellington, New Zealand (hardiness zone 9)  where they only get late afternoon sun. They have tolerated winter night temperatures averaging around  + 5 C  with occasional frosts down to around  -3 C, possibly they survive because they do not get morning sun ( the sudden temperature change is often what kills tender plants).

Sunday, May 1, 2016

Expectation Adjustment as willpower tool (for self-sufficiency)

I've tried quite a few willpower (self-regulation/self-control) techniques from books by Roy Baumeister and Kelly McGonigal and others, all quite helpful. But have found for me personally, wanting to boost my performance in efforts to be self-sufficient in food production, the best technique has been to adjust my expectations of how pleasurable and easy gardening is and should be.

I suspect most people interested in getting back to nature and growing their own food because they don't like the industrial "system"  have a rather "idealistic" "romantic" "hippy" "greenie" "Garden of Eden" idea of what gardening will be like, everything will be harmonious, cooperative and nice. This view is not limited to "greenies" this has been called the Pastoral Fallacy (7) and the Arcadian Fallacy. New Zealand was largely colonized on the basis of this myth/lie. Early advertisements in England for the country  typically said things like " everywhere pigs drunk from eating fermented wild peaches, begging to be shot" (8). Perhaps all societies since prehistory have held such beliefs about new frontiers.  So this particular adjustment may be of use to this relatively large group of people in particular. It simply means changing your expectations to accept gardening will indeed be magical, beautiful and pleasant but at times may also be ugly, disappointing, unpleasant, boring and difficult.

I don't think doing this is especially unusual, since thinking about this I've noticed people quite often talk about "being prepared" psychologically, for instance I recently read (something like) "rats make wonderful pets but they only live a few years so be prepared".  I just haven't seen it discussed in science based writing on willpower/self-regulation, so it seemed worth writing about.

"Expectation adjustment" is my term, I got the idea after noticing many of the willpower techniques Baumeister reports on already seem to exist in the military, such as tidiness and eating well (glucose believed to be the chemical basis of willpower) which reminds one of the saying "an army marches on it's stomach". So I started wondering about other thing the military do, since sacrificing your own life and killing others in battle are probably the most difficult things a rational person can attempt to do (5) and an effective army really needs to be more rational than emotional (6). It seems to me the expectation and acceptance they are going to do something extremely unpleasant and undesirable is a major factor in how soldiers are able to conduct war, or even disaster relief, imagine if they expected it to be nice*.

There is a cruel but hilarious experiment in Baumeister's book that seems to touch on this, by Mark Muraven. Runners were given equal distances to run, but some were told the run was shorter, then were told there was more to do once they'd completed this, these runners performed poorly for the remainder of the run compared with the other group (pg 34 Ref 1). This was discussed in terms of conservation of energy, but to me it is an example of being psychologically prepared or not prepared; "expectation adjustment".

I think this phenomenon may also have something to do with overcoming addiction through acceptance of the unpleasantness of addictive cravings "riding the wave" McGonigal talks about. (pg 225 Ref 2). Also ascetic people are better at difficult tasks I recently heard (3) by taking the emphasis off seeking pleasure I suppose this makes you more ascetic, temporarily.

The reality is sometimes gardening is negative, weeds and pests are competing with you and would gladly take over your niche if they could, you can't always be nice to all plants or animals. The elements don't care about you, nor does the land itself, but if you use your head and your body eventually you'll get back what you give. The aim of being self-sufficient should presumably be a degree of autonomy or independence, if seeking pleasure gets in the way of this it will have to be dispensed with for the moment. In the end you'll have far more beauty and pleasure that way.

* I'm not entirely certain adjusting expectation always fits the psychologists definition of willpower/self-control/self-regulation.  I've even wondered if this approach, at least the way I have been using it, actually makes me have less self-control as I seem to take more risks and become more daring as a result of not worrying about unpleasantness, trait normally associated with poor self-control or impulsivity. There are times when we need less self control (when conceiving a child or getting a flash of artistic inspiration) and times when we need more (when dealing with a misbehaving child or developing an artistic idea into a work of art).

Finding ways of deliberately reducing willpower/ self-control, for specific tasks for limited periods, may turn out to be just as important for a full balanced life as ways of increasing self-control, which appears to be the main, or even sole, focus of science at the moment.

At times I find the terms will power/self-control/self-regulation rather confusing anyway, for instance in a famous experiment children who resist the temptation to eat a marshmallow are considered to have more willpower than those who stared at it & usually gave in and ate it, that seems more like a technique that serves the will than actual will to me. I find adjusting expectation to be a  a way of doing something I believe I should be doing but don't feel like doing, which is all the matters to me, not terminology.

After thoughts.

Since writing the above I emailed the authors of "Self-Regulation and the Five-Factor Model of Personality Traits" in "Handbook of Personality and Self-Regulation" about my experiences. Corina Lockenhoff responded explaining that what I decided to call "expectation adjustment" sounds like what psychologists call "task framing", a term I was unaware of & will most likely use in future.

Another possible insight since writing the above is I noticed I've been working much more in the garden since moving my studio to my home, before I was catching buses across town to get to my studio. It appears the commute was draining my willpower, an example of what Baumeister & Tierney refer to when they say "pick your battles"; we all have limited willpower, we have to save it for the most important things, don't try to do too many challenging things. 

The thing is I would have never thought catching buses through town was depleting my willpower as I find negotiating the chaos of public transport and city crowds entertaining and educational. But perhaps maintaining civility in such anarchy does exactly that, drains willpower, probably a good example of what Ivan Illich called Shadow Work (9); unpaid toil and time required to support industrialism. Even more so if it is actually eclipsing our ability to do sustainable autonomous work by depleting our self-control, leaving us in a state fit only for impulsive activities, probably impulsive consumption of addictive industrial commodities in particular. Sometimes it may be a good idea to be on the lookout for seemingly inconsequential, even enjoyable, things that are depleting vital mental energy, stopping one from being able to do the important things. 

In other words, in order to do something you want to do, but find impossible, you may have to drop one or more activities from your current routine. I find this a very humbling idea, it makes you face your limits. But expecting the science of self-control to help us perform multiple superhuman feats, as I was, is probably unrealistic. Such high expectations may ironically be a symptom of the prevailing culture of narcissism/grandiosity psychologists like Baumeister (1) have criticized extensively for weakening self control.    

Finally, it also seems possible I simply became "home-centred" moving my studio home, before I was probably mainly "town-centred". "A man cannot have two masters" as a Christian friend of mine used to say, perhaps that means he also cannot have two "centres".  


1)Willpower. Rediscovering the Greatest Human Strength. Roy Baumeister & John Tierney 2011
2) The Willpower Instinct. How Self-control works, why it matters
 and what you can do to get more of it. Kelly McGonigal 2012
 3)  Jim Mora interviewing Marc Wilson on 'refutation' of Baumeister's ego depletion theory. Radio New Zealand 11:06 am 30/4/16
4) Overwhelming Terror. Love, Fear, Peace and Violence among Semai of Malaysia. Robert Knox Dentan, 2008.
5) Our Inner Ape. A Leading Primatologist Explains why we are who we are. Franz de Waal 2006.
6) Civilisation. K Clark. 1969
7) The Ideal Society and its Enemies: The Foundations of Modern New Zealand Society 1850-1900. Miles Fairburn. 1989.
8) Shadow Work. Ivan Illich 1981

Wednesday, April 27, 2016

Pontederia cordata rhizome tasty when cooked

Picture: Pontederia cordata var lanceolata (a larger form) with boiled rhizome sections.

I found the peeled rhizomes of the aquatic plant Pontederia cordata (Pickerel Weed or Rush) quiet tasty after boiling for 5 minutes then frying. They were pretty firm, perhaps they need longer boiling, tasting mildly like mushroom, pate and mud, in a good, interesting way.

I am not aware of any book saying the rhizomes are edible but one says all parts are (see 1).  I tried them anyway as I've carefully sampled every part over many years and it seems utterly non-toxic, the parts known to be edible taste the same as all other parts (raw), much like the water the plant grows in. Also no part has ever been reported toxic. There are several internet sites saying the rhizomes have been eaten, such as Hilton Pond Center which states the rhizomes have been stewed as a potato substitute (2). Also various birds eat the rhizome along with other parts.

This looks like a very easy, reliable, at least moderately productive, root crop to me.

I started growing this aquatic plant in tubs because I wanted the edible nut-like seeds, however they do not appear to be produced here in New Zealand, perhaps because the required pollinator (1) is absent. I've found the supposedly edible young leaves and very young stems to be very disappointing, tiny & sparse, but have tried the small flowers, better, basically tasting watery too.  

1 )

Monday, April 25, 2016

Possibility of Pomacea as Temperate Micro-livestock.

Pictured is a tropical water snail, which I believe to be Pomacea bridgesi, which has grown to 1.75 cm over two years, possibly less, in an outdoor aquatic plant tub in temperate Wellington, New Zealand (hardiness zone 9). This species is harvested for meat in tropical and subtropical regions (1), no doubt when it has grown to its much more impressive full size of 4-6 cm. 

Growth appears to be dependent on heat, seems to be very slow in winter, much faster in hot weather, and it has been an unusually long, hot summer. Based on reports of growth rate in tropical countries growth is much slower here than there, but I will be watching with interest the progress of this and around 100 babies, in the coming years.  At this stage I'm only reporting on them as a potential temperate micro-livestock, since I was so surprised they even survived and reproduced outside not to mention one growing to an almost respectable size. 

Slaughtering snails for meat might raise fewer ethical and psychological issues for people who would normally avoid slaughtering complex animals for meat. I'm not sure I'll ever be slaughtering them for meat myself. I'm more interested in the potential for others who want to produce their own meat, especially in squeamish suburbs (or perhaps even apartment blocks, they could conceivably grow in tubs on balconies) .

Another advantage is it appears to require little care or feeding, I have it in tubs with edible aquatic plants, such as Nymphaea odorata, and Aponogeton distachyos, they seem to mainly eat the algae growing on the plants, though the Aponogeton occasionally looks pretty mauled. There might be potential to supply them with foods that make them grow faster.

An additional advantage is they don't need elaborate containment structures like gourmet land snails, they seem to stay in, or very near the water. Though it appears they can attach themselves to animals that visit the water and escape that way, presumably this explains how a number ended up looking quite happy in my dog's water bowl some distance away inside!

A disadvantage is they often lay eggs on, and cling to the underside of the edible aquatic leaves I harvest for dinner. It can be fiddly getting them all off. I understand some water snails have extremely toxic eggs, I believe these are species with very brightly colored eggs, showy displays are usually a sign of danger in the animal, plant and human worlds. The eggs of my snails are transparent, indicating they are "hiding" because they are non-toxic, probably I have eaten a few of them by accident with no noticeable effect. But plants are more my area than snails, I strongly encourage doing your own research or find an expert on this subject. 

Another disadvantage is they would be difficult to remove from a tub or pond once established, I tried with chlorinated water which kills many fish, they loved it. Perhaps a traditional fish toxin like saponins from various plants would be worth a try, otherwise complete draining might work, but they actually have lungs as well as gills so might even survive that, at least for a while.  

I discovered they could survive outside entirely by accident, I was raising them indoors in a tank, it didn't seem to be going well, the older large ones, purchased at a pet shop, kept dying. So I gave up on the project and dumped the water, containing a few tiny baby snails, into some of my outdoor water plant tubs expecting that to be the end of it. Much to my surprise I noticed eggs everywhere shortly after. So they are able to go through their full reproductive cycle when very small, they do not need to grow large for this.

1) Apple Snails in the Aquarium. Dr G Perera, J Walls 1996


Friday, April 22, 2016

Gordonia yunnanensis: Potential Temperate Caffeine Crop

I think the plant Gordonia yunnanensis (Camellia taliensis) could be a good source of caffeine for home gardeners, perhaps even orchardists, in temperate climates such as Wellington, New Zealand.

This attractive tree has long been used for tea, collected from the wild, in the Yunnan Province of China (1). It has only recently become widely available in the nursery trade elsewhere, it also appears that it was only discovered to contain caffeine as recently as 1984 (2). Presumably communism kept it unavailable and little known to outsiders until very recently.

So far there seems to be little interest in this plant as a caffeine crop, which seems a little surprising given the economic importance of "mildly" addictive caffeine, found in very few plant species. As far as I'm aware it has been marketed exclusively as an ornamental not a caffeine/tea source in the nursery trade. I am also not aware of any books or sites recommending it as a caffeine source for home gardeners, only sparse scientific texts and the odd traveler seem to refer to use as tea. Conceivably the recent name change from Camellia taliensis to Gordonia yunnanensis has not helped, I'm not aware of a reference associating the new name with caffeine or tea.

The plant pictured has been in my garden, largely neglected, in Wellington, New Zealand, for about a year.  It has not minded winter with night temperatures usually around 3 C, sometimes down to -5 C . It also seemed to be oblivious to a very dry summer and below average, fairly hard clay soil. Some other plants I gave much more care to did not do so well, losing up to half of their leaves. Perhaps I over-fertilized them, a potential problem with the related tea plant.

I have not had the plant long enough to judge how productive they are, growth was impressive in spring but so far very slow at other times. Determining productivity is my main objective in the next few years.

I have not drunk it a lot yet but tried a few cups, it seemed better than standard (Camellia sinensis) tea to me which I don't like much because of its astringency. This tea does not appear to be very astringent, drunk on an empty stomach (without milk or lemon to counteract the astringency) I only got very mild if any symptoms of astringency that I get from tea on an empty stomach, such as feeling of, or actual, vomiting and dry mouth. I suppose it's possible it was just too weak because I didn't prepare it in the correct/traditional way whatever that is ( I dried one large leaf on a sunny window sill for a few days then poured boiling water on it and let it sit for a few minutes).

It doesn't seem to have a strong taste of anything to me, a bit like mild tea when dried. There are comments on the net saying it doesn't taste that good, to me this is a minor problem if you think producing your own caffeine is more desirable than getting the third world to grow it for you and having corporations ship it around the world for you.  Plenty of tasty things could be grown and brewed with it to improve its rather bland, mild flavor if that's an issue. In my opinion almost any flavor associated with something addictive starts to taste mighty good over time, look at beer, tobacco or wine.

I chewed the raw flowers (without swallowing) thinking they might be edible like the related Camellia japonica.  After about a minute they produced a kind of burning sensation at the top of the mouth right at the back lasting about five minutes, tangy, perhaps like oxalic acid multiplied many times. I infer from this they are not edible raw. It is conceivable they'd be edible if dried and cooked as is apparently always done with Camellia japonica but I won't be trying that any time soon.


2) Teas, Cocoa and Coffee: Plant Secondary metabolite and Health. Crozier, Ashihara, Toma-Barberan 2011

Thursday, March 24, 2016

"Wandering Jew" (Tradescantia fluminensis) Pizza

This was an experiment to  use the leaves of the very common New Zealand weed Tradescantia
fluminensis in place of cheese for a pizza, I found it delicious and refreshing. Cheese is obviously supremely delicious but not usually refreshing at all in my experience.

I have experimented with many fruit and vegetables in place of cheese, so far I've found Kale to be best, first boiled then chopped and fried then put on the pizza to be roasted with other ingredients.

I've found trying to find a plant based food or combination of foods that competes with cheese on it's own terms to be futile, doing something quite different but good in it's own unique way to be the only hope, so far that's Kale.

Trying to compete with animal products on their own terms, or to imitate them, seems to be a common mistake with vegetarian and vegan cooking.

I decided to try the "worthless" weed Tradescantia fluminensis, for my pizza when I'd run out of Kale. I removed the young and old leaves from the stems (which I had to kill in a blender before adding to my worm farm) and prepared it in the same way as Kale; boiled (to soften it), chopped, fried (for intense flavor)  then roasted with the rest of the pizza. I fried them in a generous amount of Avocado oil which I'm sure helped. The only problem was there were three small tough bits still in my mouth when I'd finished which had not been swallowed, I had to remove them and discard them. It's possible I didn't notice dead bits of leaf or stem when preparing, or more likely I fried the finely chopped leaves for too long, more or less burning a few bits.

It's worth noting there appears to be only one authority who states this plant is edible, Francios Couplan Ph.D (The Encylopedia of Edible Plants of North America 1998), he recommends the young leaves cooked. It's possible old leaves are avoided because of overly tough bits like those mentioned above, but I've been eating the older leaves fairly regularly for 10 years (usually in other ways than fried, including raw) and never been aware of this before.

The only real problem with using Wandering Jew regularly as food is that it does not appear to have been analysed for nutrient content, so is best used just as a novelty or last resort until this happens (if it ever happens), especially given its apparent rare use as food. Better to stick with something super-nutritious & widely used like Kale, most of the time.

It is encouraging, however, that the similar Commelina nudiflora from the same family has been analysed and suggested as a cheap source of Vitamins C, B3 and B2 as well as other macro and micro nutrients (1).

1. Nutritive and Anti-Nutritive Properties of Boerhavia diffusa and Commelina nudiflora Leaves. C.O. Ujowundu , C.U. Igwe , V.H.A. Enemor , L.A. Nwaogu and O.E. Okafor.

Wednesday, February 24, 2016

Paintings on a "battered but enduring" theme

Above: Painting by David Nicholls "Moon Girl, Earth Sail, Sun Ocean" mainly depicts someone battered by the ravages of time, & maybe bad luck & decisions still managing to take control of their situation when feeling sorry for oneself or giving up would be easier.

Below: Pumice-head with Skyscraper cocoon. Acrylic paint on canvas, pumice from a New Zealand Volcano (head) and Fimo (hat).

Below: Next to the six girls of the Caryatid Porch (dated around 400 BC) in Athens, also battered by the ravages of time but still flourishing in their own way.

Monday, February 1, 2016

Lamiastrum galeobdolon as hanging indoor edible

I find the plant Yellow Archangel (syn. Aluminium Plant, Artillery Plant, Lamiastrum galeleobdon, Lamium galeobdolon, Galeobdolon luteum) makes a good indoor source of greens, with its long runners hanging down beside a window maximizing use of limited space and light. Being a shade loving plant it grows with only a few hours direct sunlight. perhaps less. It is considered an invasive plant so can be expected to be reasonably productive. I only have it as a bad weather or late night source of greens, when I don't want to go outside, I have not tried to determine maximum possible productivity.

It is a little strange only a few authorities state the plant is edible (Food for Free. A Guide to the Edible Wild Plants of Britain by Richard Mabey 1972) Miles Irving also discusses its gourmet uses, though some of it could be interpreted as referring to ornamental use (The Forager Handbook (2009) perhaps there are others.  Mabey recommends "young shoots and leaves" cooked, somewhere along the way I forgot the details and started eating the boiled mature leaves too, like the young leaves they are fairly bland after brief boiling. Raw the leaves taste like detergent, perhaps this is why there does not appear to be an ancient tradition of eating the plant as one might expect from an edible native of Europe. 

Unfortunately in the process of researching this post I learned this plant is considered an "Unwanted Organism" here in New Zealand which means it is illegal to propagate it. A pity, dense rows of these plants hanging between skyscrapers could provide food for the inner city. This could make apartment dwellers less of a "pest species" needing food to be transported at environmental expense immeasurably greater than any caused by this plant.

Maybe there are other edible, shade loving plants with long runners that could be used in the same way, that hopefully meet with the approval of the authorities. 


It's been a year since I wrote this and I've found Yellow Archangel is not very productive in a hanging basket, at least the way I managed it, I found after cutting stems off, regrowth was very slow. 

I'm finding Tradescantia fluminensis, Wandering Jew, is the most productive hanging basket leaf crop tried so far. It is often grown as  a hanging basket plant around the world, in New Zealand it is regarded as a serious weed I'm not aware of it being used much for this here. But I'm finding it is handy indoors as occasional addition to cooking when its too dark, cold or wet to go out.

I'm only aware of one book reporting this plant is edible; The Encyclopedia of Edible Plants of North America by F Couplan PhD 1998. I've eaten it cooked many times, it is okay in flavor...nothing special.       

Friday, January 22, 2016

'Bacon' Avocado Fruit 'Stores' on Tree in Temperate Climate

Above is the fruit of a 'Bacon' variety of Avocado (Persea americana) grown in Central Wellington, New Zealand, a temperate climate. I missed this fruit 3-4 months ago when picking the main crop in Sept-October, it's now late January. I've just eaten it and it seemed fine to me, ripened on a window sill. Probably more mushy than usual seemingly because it took longer to ripen all over, that might be fixed with special ripening methods such as proximity to flour to speed up the process. Experts sometimes talk of Avocado fruit going "bad" left on the tree making some varieties unsuitable for this purpose, referring to this as "bacony" in flavor (it's just a coincidence this variety also happens to be called "Bacon"). I don't know what this "off"  taste is like but it didn't seem to taste different to me (though I ate the other ones several months earlier so hard to be absolutely certain, it's possible the flavor lingered in the mouth longer than usual (I'd say if this Avocado was "bacony" the flavor would not put anyone off who values producing their own food above consumerism). 

Several varieties of Avocado are valued for their ability to "store" fruit on the tree such as Hass and Reed, meaning fruit can be left on the tree for months and will not ripen until picked, a major advantage. I have not seen reports of the 'Bacon' variety doing this anywhere on the net or in books. I have seen predictions from an authoritative sounding webpage from elsewhere in New Zealand (which I can't relocated at present) that another variety that does not 'store' in hot climates will probably do so in cooler climates, which seems to have happened here.

I'm not saying at this stage 'Bacon' could be grown for an extended season commercial crop, I doubt the mushy fruit would be good enough for consumers, the taste would also need to be tested by experts. But for my purposes, producing as much of my own food year round in the home garden, it is a very exciting discovery indeed.